/*
*This code is part of an instructable at "".
*This code is public domain, you may use it for whatever you would like.
*Code by: Adam Berger
*/
const byte led1 = 2, led2 = 0, led3 = 1, led4 = 4, button = 3;
unsigned long pMillis = 0;
byte mode = 0;
void setup(){
  pinMode(led1, OUTPUT);
  pinMode(led2, OUTPUT);
  pinMode(led3, OUTPUT);
  pinMode(led4, OUTPUT);
  
  pinMode(button, INPUT);
  digitalWrite(button, HIGH);
}

void loop(){
  if(digitalRead(button)==LOW){
  if(millis()-pMillis>500){
     mode++;
     pMillis=millis();
   }
  }
   if(mode>7){
     mode=0;
  }
  switch(mode){
   case 0: circle(200); break;
   case 1: circle(100); break;
   case 2: blink(200); break;
   case 3: blink(100); break;
   case 4: inOut(200); break;
   case 5: inOut(100); break;
   case 6: wave(200); break;
   case 7: wave(100); break;
  }
}

void circle(int d){
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  
  digitalWrite(led1, HIGH); 
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led1, LOW); 
  digitalWrite(led2, HIGH);
  if(digitalRead(button)==LOW) return; 
  delay(d);
  digitalWrite(led2, LOW); 
  digitalWrite(led3, HIGH); 
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led3, LOW); 
  digitalWrite(led4, HIGH);
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led4, LOW); 
}

void blink(int d){
  digitalWrite(led1, HIGH);
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  digitalWrite(led4, HIGH);
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  if(digitalRead(button)==LOW) return;
  delay(d);
}

void inOut(int d){
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  
  digitalWrite(led2, HIGH);
  digitalWrite(led3, HIGH);
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led1, HIGH);
  digitalWrite(led4, HIGH);
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led1, LOW);
  digitalWrite(led4, LOW);
  if(digitalRead(button)==LOW) return;
  delay(d);
}

void wave(int d){
  digitalWrite(led1, LOW);
  digitalWrite(led2, LOW);
  digitalWrite(led3, LOW);
  digitalWrite(led4, LOW);
  digitalWrite(led1, HIGH); 
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led1, LOW); 
  digitalWrite(led2, HIGH);
  if(digitalRead(button)==LOW) return; 
  delay(d);
  digitalWrite(led2, LOW); 
  digitalWrite(led3, HIGH); 
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led3, LOW); 
  digitalWrite(led4, HIGH);
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led4, LOW); 
  digitalWrite(led3, HIGH);
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led3, LOW); 
  digitalWrite(led2, HIGH);
  if(digitalRead(button)==LOW) return;
  delay(d);
  digitalWrite(led2, LOW); 
  
}